Extension stepladder



Sept. 4, 1945. l J. H @LOWER 2,383,962

EXTENS ION STEPLADDER www GUM/WMA sept. 4, 1945. J H, GLOWER Y 2,383,962

EXTENS ION STEPLADDER Filed May 3, 1944 2 Sheets-Sheet 2 z 575 f4 v z/3f' 3 Jaim Hazowf mmf-M4 W Patented Sept. 4, 1945 y UNITED.; STATES f lPATENT g oFFl-CE '4 I', u. LV2-.,383962, I A- s l I n g. n EXTENSIONs'rErLADDER I, John III. Glower, Chicagmvlll. v

Application May 3, 1944, SerialNo.-533,`9'62 s'olaims. `(o1. 22S-21')Figure 3 is a horizontal sectional view taken on the line 3 3 of Figure2;

Figure 4 is a horizontal sectional View taken on the line 4--4 of Figure2;

Figure 5 is a vertical sectional View taken on the line 5--5 of'Figure2;

Figure 6 is a View in central vertical section with the extension inadjusted position; and

Figure 7 is a cross sectional View taken on the line 1 1 of Figure 6.

Referring specically to the drawings, thestepladder has a step sectionas at I comprising side members or stiles II bridged by a top'step I2and a series of narrower steps I3, beneath the same, rods or bolts I4,preferably of metal, being used to connect the stiles II, and to engagedirectly against the lower surfaces of the steps I3 to reinforce thesame.

L-shapedv brackets I are suitably bolted or otherwise rigidly fastenedas at I6 against the under surface of the top step I2 and therethroughV-shaped openings I'I are provided. Said stiles II are rigidly connectedto the brackets I5 by bolts I8, which bolts serve to rigidly connectbars I9 against the outer sides of the stiles, which bars are providedwith V- shaped slots in transverse registry with the slots I1.

A pair of legs 20 are connected together by one or more rungs 2l, andthe upper ends of the legs have bolts 22 passing therethrough whichpivotally and slidably connect the legs in the slots I'I, the upper endsof the legs being disposed between the brackets I5 and plates I9.

Between the legs and step section I0, a suitable means is provided tolimit relative movement so that the device as thus far described mayeffectively serve as a stepladder. Such means comprises four links 23all pivotally connected by a bolt 24 to a roller or tube 25, and beingindividually pivoted as at 26 to adjacent stiles II and legs 20.

Secured against the inner surfaces of the legs 20 and projectingrearwardly beyond the legs, are bars 24, bolts 25, or the equivalentbeing used to secure them to the legs. Such bars each has a longitudinals1ot,26 provided with a series of lateral branches 21 terminating inportions 28 parallel with the slots 26.

An extension section 29 consists of two side bars 30 adapted `to slideon the rearsurfaces of the legs 20 and overlap the outer sides oi thebars 24, such bars 30 being connected by a series of cross elements 3lwhich may be rungs so as to permit climbing thereon. Said extension 29also has a transverse rod 32 which is adapted to travel in the slots 26and into any selected branches 21, so that the extension may bepositioned at various adjustments below the lower ends of the legs 20,thus enabling support of the legs and of the step section at dierentelevations, as on steps or otherwise.

To more securely hold the extension against displacement in itsdifferent adjusted positions,

hooks or other fastenings 33 are pivoted at 34 to the legs and areengageable with eyelets 35 secured to the bars 30 at various locations.

The adjustment of the upper ends of the legs 2D, by means of the bolts22 and slots Il, enable the legs to be positioned at different distancesfrom the step section Ii), as preferred, according to whether the deviceis used as an ordinary step-s ladder or with the extension.

Various changes may be resorted to provided they fall within the spiritand scope of the invention.

I claim as my invention:

l. A device of the class described comprising a'step section, legspivoted to said section, bars secured to said legs having slots providedwith branches, an extension section, and said extension section having arod extending across the same and movable in said slots and branches toposition and secure the extensio-n in adjusted positions.

2. A device of the class described comp-rising a step section, legspivoted t0 said section,bars secured to said legs having slots providedwith branches, an extension section, said extension section having a rodextending across the same and movable in said slots and branches toposition and secure the extension in adjusted positions, and fasteningsto secure the extension to the legs against accidental displacement.

3. A device of the class described comprising a step section, legspivoted to said section, bars on the inner surfaces of said legsextending beyond their rear surfaces, said bars having slots andbranches therethrough beyond said rear surfaces, anextension sectionhaving bars in the rear of the legs and on the outer sides of the rstmentioned bars, a rod joining the second mentioned bars, said rod beingmovable in said slots to position the extension at differentadjustments.

4. A device of the class described comprising a step section,legs'pivoted to said section1 bars on the inner surfaces of said legsextendingbeyond and fastenings to secure the extension to the legsagainst displacement. y

5. A device of the class described comprising a step section, legspivoted to said section, bars on 5 the inner surfaces of said-legsextending beyond their rear surfaces, said bars having slots and Ybranches therethrough beyond said rear surfacesi' 1' an extensionsection having bars in,thereargov the legs and on the outer sides ofthevrst "menf tioned bars, a rod joining the secondmentionedbars, saidrod being movable infsaid-slotsto e position the extension at diffrentadjustments,

"and bracket meanssecuring the legs to the step j section havingV-shaped slots, and said legs having securing elements pvotally andslidably er 1 JOHN H. GLOWER.'

